How do I get ArcGIS to show script output as it is executing an FME Workspace or Geoprocessing Tool?

I have a long running (1-2hrs) FME Workspace that I'm calling through a script. How do get the intermediate results to show in ArcGIS while it's executing?

For example, if I call the FME Workspace directly from the Python console or from the GUI, then the results will show as it is executing in the console or the results window, respectfully. However, it won't show any results when called from the script. The best I can do is show all results at the end using the following.